The Obama administration plans to overhaul how it is tackling the foreclosure crisis, in part by requiring lenders to temporarily slash or eliminate monthly mortgage payments for many borrowers who are unemployed, senior officials said Thursday.

Banks and other lenders would have to reduce the payments to no more than 31 percent of a borrower's income, which would typically be the amount of unemployment insurance, for three to six months. In some cases, administration officials said, a lender could allow a borrower to skip payments altogether.

The new push, which the White House is scheduled to announce Friday, takes direct aim at the major cause of the current wave of foreclosures: the spike in unemployment. While the initial mortgage crisis that erupted three years ago resulted from millions of risky home loans that went bad, more-recent defaults reflect the country's economic downturn and the inability of jobless borrowers to keep paying.

The administration's new push also seeks to more aggressively help borrowers who owe more on their mortgages than their properties are worth, offering financial incentives for the first time to lenders to cut the loan balances of such distressed homeowners. Those who are still current on their mortgages could get the chance to refinance on better terms into loans backed by the Federal Housing Administration.

The problem of "underwater" borrowers has bedeviled earlier administration efforts to address the mortgage crisis as home prices plunged.

Officials said the new initiatives will take effect over the next six months and be funded out of $50 billion previously allocated for foreclosure relief in the emergency bailout program for the financial system. No new taxpayer funds will be needed, the officials said.

The measures have been in the works for weeks, but President Obama is finally to release the details days after his watershed victory on health-care legislation. Following that bruising battle on Capitol Hill, his administration is now welcoming a chance to change the subject and turn its attention to the economy and, in particular, the plight of the unemployed -- concerns that are paramount for many Americans.

The administration has been facing increasing pressure from lawmakers and housing advocates to overhaul its foreclosure prevention efforts. So far, fewer than 200,000 borrowers have received permanent loan modifications under its $75 billion marquee program, known as Making Home Affordable. In the meantime, there is a growing backlog of distressed borrowers awaiting help from their lenders, which threatens to undercut efforts to stabilize the housing market.

Challenges unmet

Assistant Treasury Secretary Herbert M. Allison Jr. told a House panel Thursday that "we did not fully envision the challenges that we would encounter" when the earlier program was launched.

The efforts have been hampered by the difficulty of helping unemployed homeowners, who struggled to qualify for the government's mortgage relief plan. In requiring temporary relief for jobless borrowers, known as forbearance, officials are hoping to give them time to find a new job. Some will still need more assistance after the six-month period while others will ultimately lose their homes, administration officials said.

"We certainly support a forbearance opportunity for unemployed borrowers," said John A. Courson, chief executive of the Mortgage Bankers Association. He said he had not seen full details of the program.

Four measures

In addition to mortgage relief for unemployed borrowers, the program features four other key elements, including several steps to address the growing population of borrowers who owe significantly more than their home is worth, according to officials who spoke on the condition of anonymity because the official announcement had not been made. Underwater borrowers now make up about a quarter of all homeowners, according to First American CoreLogic. Economists consider these homeowners at higher risk of default because they cannot sell or refinance their home when they run into financial troubles.

The first key element is that the government will provide financial incentives to lenders that cut the balance of a borrower's mortgage. Banks and other lenders will be asked to reduce the principal owed on a loan if the amount is 15 percent more than their home is worth. The reduced amount would be set aside and forgiven by the lender over three years, as long as the homeowner remained current on the loan.

Until recently, administration officials had been reluctant to encourage lenders to cut the principal balance, worrying that this would encourage borrowers to become delinquent. But as federal regulators have struggled to make an impact on the foreclosure crisis, those qualms have weakened.

"We would prefer to see a required principal forgiveness program. But this is helpful," said David Berenbaum, chief program officer for the National Community Reinvestment Coalition, a nonprofit housing group. "This is another tool that will help consumers weather the crisis."

Second, the government will double the amount it pays to lenders that help modify second mortgages, such as piggyback loans, which enabled home buyers to put little or no money down, and home equity lines of credit.

These second mortgages are an added burden on struggling homeowners, especially when their total debt, as a result, is greater than their home value.

Federal officials have estimated that about half of all troubled homeowners have a second mortgage and last year launched a program to encourage lenders to restructure them. That effort has struggled to get off the ground.

Third, the new effort also increases the incentives paid to those lenders that find a way to avoid foreclosing on delinquent borrowers even if they can't qualify for mortgage relief. For example, the administration is scheduled to launch a program next month encouraging lenders to have borrowers sell their homes for less than the mortgage balance in what is known as a short sale.

Fourth, the administration is increasingly turning to the Federal Housing Administration to help underwater borrowers who are still keeping up their payments. The aim is to help these borrowers refinance into a more affordable loan. The FHA will offer incentives to lenders that reduce the amount borrowers owe on their primary mortgages by at least 10 percent.

For those borrowers who have more than one mortgage on their house, the FHA will allow refinancing of the first loan only. The new loan and any second mortgage could not exceed 15 percent of the home's value. This approach is meant to benefit not only borrowers but also lenders by allowing them to offload mortgages that might otherwise fail.

Only homeowners who are refinancing their main residence, have a credit score above 500 and can document their income are eligible.

Administration official say this refinancing program should not strain the FHA's already weakened finances because the effort will be financed with up to $14 billion out of the federal bailout program.